Key takeaways
Spironolactone (Aldactone) and furosemide (Lasix) are both diuretics, but they work differently and are used for different purposes. Spironolactone is a potassium-sparing diuretic, meaning it helps you get rid of extra fluids without losing potassium. It's used to treat heart failure, high blood pressure, and swelling from liver or kidney problems. Furosemide, on the other hand, is a loop diuretic that makes you urinate more by getting rid of extra water and electrolytes, including potassium. It's mainly used to relieve swelling and can also lower blood pressure, though it's not a first-choice option for high blood pressure. Spironolactone can cause side effects like breast tenderness and lower sex drive, while furosemide can cause dizziness and make your skin more sensitive to the sun. Both medications are available in generic forms and come in tablet and liquid forms for those who have trouble swallowing pills.
